Automatic engine-stop.



No. 812,279 PATENTED FEB. 13, 1906.

N. G, LOGKE.

AUTOMATIC ENGINE STOP. APPLIOATIQN FILED APB..10,1906.

2 SHEETBSHEET l.

Elwuwkoz MM Z M Gamm THE NORRIS PETERS co., WASHINGTON, n. c.

No. 812,279; PATENTEDPEB. 13,1906. N; c. LOGKE.

AUTOMATIC ENGINE STOP.

Arrmoulon FILED APB.10.1905.

' 2 SHEETS-SHEET 2.

M WM 4% THE mamas PETERS ca, WASHINGYON, u. c

UNITED STATES PATEN T OFFICE.

NATHANIEL CHASE LOCKE, OF SALEM, MASSACHUSETTS, ASSIGNOR TO LOCKE REGULATOR COMPANY, OF

OF MAINE.

KITTERY, MAINE, A CORPORATION AUTOMATIC ENGINE STOP.

Specification of Letters Patent.

Patented'Feb. 1a, 1906.

Application filed April 10, 1905. Serial No. 254,735.

which steam is cut oil from the engine by closing an electric circuit.

In the drawings, Figure 1 is a top plan view of my new automatic engine-stop, a part being broken away for greater clearness. Fig. 2 is a view, partially in section and partially in elevation, showing the main and auxiliar valves in combination; and Fig. 3 is a vertlcal sectional view of a part of my new engine stop at line 3 3 of Fig. 1.

In the drawings, 1 is a valve-casing containing a piston-tube connected with a pup pet 3, which seats on valve-seat 4. Casing 1 contains a steam-exhaust from chamber 6 to a point 7 below valve-seat 4, where it communicates with a steam-outlet passage 8, which may lead to an exhaust-pipe or any suitable draining apparatus;

011 the side of piston 2 opposite puppet 3 there is a live-steam chamber 9, the steam passing between the opposed walls of cylinder 2 and easing 1. For this purpose piston 2 is slightly loose in the casing, so as to allow live steam to readily pass it. From chamber -9 an exhaust-steam passage 10 leads to chamher 6, which is formed in the upper part 11 of the engine-stop. Casing 1 is attached to 11pper part 11, which has a horizontal chamber 11, provided with a valve-seat 12 for auxiliary valve 13, which controls at this point the passage 10 into chamber 6. Valve 13 is car ried by a quick-screw -14, suitably threaded in chamber 11., the screw having a cylindrioal extension 15, which is perfectly journaled in a bearing 16, fast to head-piece 11.

Extension 15 is provided with a latch 17 and is further provided with a spring 18, one end of which is fast at 19 to the extension 15 and the other end of which is fast at 20 to a disk 22, which is loose on extension 15. Disk 22 has a peripheral notch 23, in which a pin24 rests, the pin being fast in the spring-barrel 21, which is preferably provided with a handle 25. Extension 15 is rovided with an abutment 26, against whic pin 24 brings up when the spring-barrel is rocked to unseat the auxiliary valve 13. For this purpose the outer end of pin-24 projects beyond the notch 23. To seat valve 13, the valve-screw 14. and extension 15, which are all in one piece, rock backwardly. During the time the valve 13 is seated the free end of the latch is held down by an armature-catch 31,) against the tension of the spring 18. When the latchis released, the force of the spring rocks disk 22 to carry the pin 24 against abutment 26, which is fast on extension 15, and thereby this extension is rocked to unseat the valve.

The .top piece 11 carries the armature 30,

- provided with a catch-shoulder 31, with which the free end of latch 17 engages when there is no current through the magnets 32. At this time the valve is seated and held seated by the cofjperation of the latch with the shoulder31. A light spring 33-holds the armature. normally toward the latch and away from the magnets. When a current passes through the magnets, the armature is drawn away from the latch, which is thereby released from shoulder 31, and the valve 13 is unseated, as described. In operation steam enters atinlet 40, passes above piston 2, and

fills chamber 9. Whenever valve 13 is electrically operated, spring 18 uncoils, rotating the spring-barrel 21, which carries pin 23. Pin 23 strikes the cam or abutment 26, which is clamped to the extension 15, which forms the auxiliary-valve spindle and which rotates one-fourth of a turn, removing valve 13 from its seat 12 by about one-sixteenth of an inch and exhausting steam from chamber 9 through passage 10, chamber 6, and )assage 5 totheoutlet end of the valve 3. iston 2 is larger than puppet 3, and consequently the puppet is forced open, allowing steam to pass puppet 3 and ass through the valve-body. This in turn exliausts steam from the top side of the piston 60 of the main shut-off valve 61 and closing the same. This shut-06' valve 61 is conveniently in the form of a balanced valve with a cylinder and piston at one end. As one puppet 62 is larger than the other puppet 63. the puppets are forced open by tripping the electric valve, which relieves the three valves to produce an automatic engineva lve, casings for each valve, a passage connecting the casings, the puppet-valve being 7 and thus control the shut-off valve.

the steam pressure through the casing of valve (31, bringing'piston .60 near the bottom of the cylinder 64, where it remains until the steam isallowed to escape. This is done by pressure from'the top side of the piston in the main shut-ofi valve 61, inclosing the same, to v the inlet end of the main shut-off valve 61, as indicated by I and the outlet end'thereof by Q. The electric valve may be tripped by. passing a current through the magnets. The main shut-ofivalve may be connected in any suitable manner with the electric valve.

My invention maybe embodied in various: forms other than that; shown here without" departure "from it.

Valve 13 is an electrically-actuatied 'auxiliary valve; Puppet 3 is a pressuraactuated valve that is intermediate the electricallyactuated auxiliary valve 13 and the main shut-off valve 61, and I am the first, so far as known to me, to combine any'forms of said sto Y Y l hat I claim is' located in said "passage between the main and auxiliary valves, and means for actuating said auxiliary valve to control 'said passage 3. The combination "with a main shut-off valve, of a pu pet-valve and an auxiliary valve, casings or each valve; a passa e connecting said casings, the auxiliary va ve being located in the assage so as tocontrol the same,,and means or actuating said auxiliary valve by imparting thereto a rotary reciprocat" motion;

"4%1143 combination with a main shut-off valve, a puppet-valve, an auxiliary valve,

casings for said valves, a passa e connecting said casings, the auxiliaryvalve being 10- cated in said passage .so-as tocontrol the 'same, an elec'tric 'clrcult, in which said auxiliary valve is inserted, and means whereby.

the'closing of said circuit will actuate the auxiliary valve to open said passage and a0- tuate the shut-ofl valve.

5. The combination with a main shut-off valve and its casing, of a puppet-valve and an auxiliary valve, a casing for the two valves last named independent of the mainvalve casing, a passage connecting the seats of thepuppet and auxiliary valves, a passage connecting the two casings, and means for actuat' the auxiliary valve to control the passage etween the same and the puppetvalve and thus control the operation of the main shut-off valve;

6. The combination of a piston connected with a puppet; a casing therefor; an automatic auxiliary-valve casing provided wlth an exhaust-steam chamber; a passage from the top side of the piston to the outlet end of the puppet-casing and an automatically-actuated valve controlling said passage, said auxiliary valve being formed on a rockable spindle extension formed with a quickescrew' and mounted in a threaded socket in the auxiliary-valvecasing; a latch fast on'said exc tension; 2. spring operatively connected with said extension; a movable armature provided with a shoulder to en age said latch; a magnet; and means to ho (1 said armature in engagement with said latch.

7. The combination with a main shut-ofi valve, of a piston connected with a puppet and casing therefor, a passa e connecting the piston-casing with the out et end of the puppet-casing, and an electrically-actuated auxiliary valve controllin said passage, a

casing therefor, said auxi 'ary valve being formed on a rockable spindle provided with a quick-screw mounted in a threaded bearing in the auxiliary-valve casing; a latch fast on said spindle; a spring operatively connected with said spindle; an armature provided with a shoulder to-engage saidlatch; a magnet;

and means to hold said armature in engagement with said latch.

' In testimony whereof I aflix my signature in presence of two witnesses.

NATHANIEL CHASE LOCKE.

Witnesses:

EDWARD S. BEACH,

ALLEN. 

